fraction is higher the more the particle shape differs from a sphere [30], e.g. the higher the aspect ratio r for fibers [31], and prolate, fiber- or needle-like particles yield a higher viscosity than plate-or disk-shaped, oblate particles [30,35]. For concentrated suspen-sions structural order, particleinteractions and number of

An artificial graphite anode material (10–15 μm) is produced using coke at two sizes (10–15 μm, 2–5 μm) and the electrochemical properties are compared and discussed. We produce and measure an artificial graphite anode material using coke with a particle size of 10–15 μm, limited lithium ion insertion–desorption pathways, increased …

Fe-loaded needle coke particle was prepared for use as particle electrode in 3DEF. •. Fe-NCPEs exhibited good hardness, catalytic reaction activity, and …

Belitskus [5] confirmed that spherical coke particles pack better than plate-like or needle-like ones, thus even particles with more porosity may result in a higher vibrated bulk density. Sverdlin et al. [6] reported that irregular shape and rough surface of coke particles up to 12 mm prevented the movement in a viscous medium.

needle,sponge, and shot coke particles whereas Fig. 5 shows a mix of all three structures present in one particle. Figure 4a shows the anisotropic microstructure of needle coke particles which has large laminar porosities that are wider in the middle and tapering to a point toward the ends. Needle coke particles appear as a cluster of aligned ...

This transformation, accompanied by a 12% volume increase and a 4.6° unit cell shape change, is analogous to the tetragonal-to-monoclinic transformation in zirconia. Due to the processing methods used, previous studies into the particle size effect were limited by a wide range of particle size distribution.

@article{Hu2024PreparationOP, title={Preparation of particle electrodes for landfill leachate treatment by doping Cu2+-modified needle coke with Fe-based oxides extracted from iron tailings}, author={Yang Hu and Yanqiu Wang and Lihong Kou and Xinyu Gao and Yixian Wang and Yuting Guo and Xiao Li}, journal={Chemical Engineering …

Preparation of Fe-loaded needle coke particle electrodes and utilisation in three-dimensional electro-Fenton oxidation of coking wastewater Hu, Yang; Yu, Fuzhi; Bai, Zhongteng; Wang, Yanqiu; Zhang, Huan ...

The optimal preparation conditions of the Fe/Cu-NCPE were obtained as Cu 2+-modified needle coke: Fe-based oxides: binder = 32:8:15, particle size of 5 ± 0.5 mm, and Cu 2+ loading of 3 %. The spectral analysis shows that the Fe/Cu-NCPE prepared in this study is a kind of particle electrode with superior performance and good stability.

Here we describe the immune responses induced by hydroxyapatite particles of defined sizes and morphologies (Smooth spherical particles with mean size 0.1 μm − S 0.1, Needle-shaped particles ...

Abstract and Figures. The effect crystal morphology has on measured particle size distributions (PSDs) is explored, with a focus on particles exhibiting a needle-like habit. An idealized in silico ...

Needle Coke. Mitsubishi Chemical Corporation. Carbon / Carbon Fibers & Composite Materials. Language. Needle cokes are used as a primary material for graphite electrodes in electric furnace. Coal-based needle …

Properties. Petroleum coke is a hard solid petroleum product in black or dark gray, and is characterized by metallic luster and porosity. It is carbon-shaped stuff composed of tiny graphite crystals formed into granules, columns or needles. The composition of petroleum coke is hydrocarbons, containing 90-97% carbon, 1.5-8% hydrogen, and ...

Preparation of Cu 2+-modified needle coke materials using impregnation and calcination methods [41], and the mass of Cu 2+ in the copper sulfate solution is 3 % of the mass of the needle coke. Iron hydroxide was extracted from iron tailings by acid leaching and alkali recovery, and the Fe-based oxides was obtained by calcining at 500 °C for ...

The needle coke (NC) as a conductive additive was studied on effects of treated by ball milling on the electrical conductivity, mechanical property of the composite plates. All the characterizations showed that after ball milling, the NC particles have smaller particle size, and more uniform particle size distribution, which enhanced the ...

The device for particle-laden fluid flow involves the two-compartment hopper shown in Fig. 2b with an adjustable orifice size to accommodate d o /d ratios between 1.5 and 7.5; the double ...

The needle coke (NC) as a conductive additive was studied on effects of treated by ball milling on the electrical conductivity, mechanical property of the composite plates. All the characterizations showed that after ball milling, the NC particles have smaller particle size, and more uniform particle size distribution, which enhanced

The needle coke (NC) as a conductive additive was studied on effects of treated by ball milling on the electrical conductivity, mechanical property of the composite plates. All the …

The effect crystal morphology has on measured particle size distributions (PSDs) is explored, with a focus on particles exhibiting a needle-like habit. An idealized in silico study was performed, targeted …

Needle coke and regular coke were selected as raw materials and pulverized to 2–25 μm to determine the effects of crystalline properties on particle shape after pulverization. Needle coke with ...

where ρ s = 1 g/cm 3, d g is the particle geometric diameter, ρ e is the effective particle density in the same unit as ρ s, and λ is the dynamic shape factor of the particle (1,2,4).This shape factor is defined as the ratio of the drag force of the particle to that of a sphere of equivalent volume ().Increasing particle surface roughness would …

The optimal preparation conditions of the Fe/Cu-NCPE were obtained as Cu 2+-modified needle coke: Fe-based oxides: binder = 32:8:15, particle size of 5 ± 0.5 mm, and Cu 2+ loading of 3 %. The spectral analysis shows that the Fe/Cu-NCPE prepared in this study is a kind of particle electrode with superior performance and good stability.

GPC has several different structural forms commonly referred to as needle coke, sponge coke, and shot coke. ... Shot coke has a characteristic spherical particle shape and a dense, highly isotropic texture sometimes referred to as a granular texture. Shot coke has a high CTE (>5.5) and typically higher levels of sulfur and trace metal ...

crushed coke samples (~3-mm particles) are prepared. An image of the coke particles is obtained in secondary electrons. Analytical samples (particle size <0.2 mm) are pre-pared for X-ray microanalysis. The characteristic X-ray spectra of the samples are recorded from 1-mm 2 sections, with an accelerating voltage of 20 kV and a probe current of ...

2.3.2.1 Process description of fluid coking. Fluid coking is a thermal cracking process consisting of a fluidized bed reactor and a fluidized bed burner. A flow diagram is shown in Figure 5. Vacuum residue is preheated and fed to a scrubber that operates at 370°C above the reactor for coke fine particle recovery.

A batch process, in this article referred to as the multistage process, to transform needle-like seed particles into more equant particles was previously modeled and tested experimentally by Salvatori, Mazzotti, 2017, Salvatori, Mazzotti, 2018 and Salvatori et al. (2019). To overcome the common lack of physical actuators for particle …

The more anisotropic the coke, the more needle-like the shape of the particles11. Such a shape is needed to produce premium electrodes3 and imparts …

The differences found in the crystal structure and morphology of coke particles made it possible to divide the studied samples into 2 groups: isotropic, with equal longitudinal and transverse...

Fig. 6 (d–f) demonstrates the diversity in the shape of Gilsonite coke. In addition to spherical particles, some of the coke has an irregular shape (Fig. 6 (e)), and Gilsonite coke fragments (Fig. 6 (f)) are also found. ... Needle coke particles observed by optical texture analysis account for 0.6% of the total volume of NBG-18. 5.